1) The Holdings records should either include 853/863 paired fields or an 866 Summary field. See the MARC Holdings documentation for more information:
http://www.loc.gov/marc/holdings/hd86686 8.html
2) Each volume should have its own item record. The item record should include the volume information in both the "Description:' field and in the appropriate "Enumeration levels" if necessary. See the ALEPH Item Processing Guide for more information: http://hul.harvard.edu/ois/systems/aleph/docs/train_item.pdf
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